Core chuck



Oct. 2, 1923. 1,469,754

J. w. DIRKSON ET AL GORE CHUCK Filed Oct. 15. 1920 3 Sheets-Sheet 1 1,469 754 1923' J. w. DIRKSON ET AL CORECHUCK Filed on; 15. 1920 3 Sheets-Sheet 2 Oct. 2, 1923. 1,469,754,

J. W. D| RKSON ET AL conbcnucx Filed Oct. 15, 1920 3 Sheets-Sheet 3 Patented Oct. 2, 1923.

" D, STATE? PATENT OFFICE OHN w. h s; infer ncur/ Ann has a. spouse, or AKRON, onto, assxeivons 'ro THE Mason 'rIBE Ann nonnnnoorarany, Alcon-ronn'r olv or oHIo.

' V i diC OR-E cr'mcx.

Application filed October 15, 1920. Serial No. 417,220.

To ail wr/w in if may concern."

lie it known that we. Jon): W. I)IRKSON, a citizen of the United States, residing-at Kent. in the county of Portage and Staten? ()himand Lnr. E. CnoUGI-I, aqcitinen otthe l nited States. residing at Akron 'in -the eounty rl Summit and tate of Ohio, have invented certain newand useful Improvements in a (lore Chuck, of which the following is a specification.

()ur invention relates to improvements in core chucks. and has for its object, the provision of a chu -k "for rotatably supporting the cores for building the carcasses of automobile tires. and one that is more rapid and mnvenient in operation during the construe tion (it the carcass, than any chuck of the prior art. Moreover. our improved, chuck host lends itself to employment with annular ures of diiierent diameters. being capable of ready conversion for use with widely difl'erent sizes of cores.

The features of our improvements reside in the compact structure afforded by the employment of a short shaft and an externally threaded ronieal member operated by the haml-wheel, while convertible studs are adapted to be inserted in the arms of the chuck and are held in position by a bayonet lock joint.

The features of our improvements may be more readily explained in connection with the accompanying drawings. wherein Fig. 1 is a PQISPECl'iVB view of the chuck and its stand broken away near the upper portion thereof.

Fig. 2 is a side elevation of the chuck and handwheel, also indicating the operating mechanism in dotted lines.

Fig. 3 is a fragmentary section thru one of the arms of said chuck.

Fig. 4 is a view of one of the adjustable studs.

Fig. 5 is a top view, and,

Fig. 6 a fragmentary side view of the bayonet lock for the studs, shown upon an enlarged scale, and

Fig. 7 is a front elevation with an annular core mounted in position thereon.

Throughout the several figures of the drawing we have employed the same character of reference to indicate similar parts.

The three armed castingu is provided upon the short sha ft. 7; adapted for rotation Within the stand, 0 by means of a vertical shaft,

cfl'and connecting bevel-ed gears not shown in the drawing. Said casting is keyed at (3 upon the shaft While a conical member e provided preferably with large righthand square cut threads, 2. is inserted at the front otthe wasting and is adapted for actuation therein-by'meansofi an extra size handwheel 7; These threads beingexteriorly positioned upon said conical member and of such large size. permit the rapid actuation of said conical member and thereby, the stud actuating means respectively contained in each of the three arms.

These means comprise, respectively, the shouldered bolt, 9', inwardly bearing upon the cone and depressed against the same by e ,0. which reacts against the stationary tubular member g".

The outer end of member 9 is bored out to receive the reduced shank h. of stud h. said shank having a cross pin h" inserted near its end. This pin in turn is adapted to be inserted in the bayonet locking slots provided at the outer end of member g, as best shown in Figs. 5 and 6.

A screw j is inserted in each of the arms a with its terminal engaging the intermediate slot j cut in member g. This serves lo prevent the partial rotation of said member and its connecting stud. which is preferably provided with chisel-edge adapted to enter a corresponding slot in the annular core is. when positioned upon the chuck.

The action of the springs firmly presses each of the sliding belts or members g, inwardly against the conical member 6, however. the sliding bolts are adapted to be rapidly actuated outwardly in radial directions by screwing in the member e by means of handwheel f to the position shown in Fig. 3, thereby extending or expanding the engaging studs radially into a locking relation with the interior of the core k.

It will be appreciated that longer or shorter studs. for example the studs respectively shown in Figs. 3 and 4, may very readily be inserted within their respective bayonet locks in arms a, whereby the chuck is adapted for use. with annular cores of widely varying sizes. This is of advantage when the production of difi'erent sizes of carcasses varies from time to time, so that the chucks in a very few moments may be adjusted to accommodate. any desired size of annular core.

Having now described, the. embodiment of 0m; intenti n or imp w ifieat; ie sla n as new, and desire to secure by Letters Patent, the following:-

1. In a clinch for supporting annular rores. the combination with a plurality of radial arms, of extensible members carried by said arms in position to engage the core; a conical member reaeting aga nst the inner portions of said extensible members, an exteriorthread ant? an amtuating handwheel rigidly con ested with and adapted to operate said eoniealmember", substantially as set forth.

2. In a chunk for supporting annular cores, the combination with a short rotalaMy actuated shaft, of a plurality of radial arms mounted thereon, extensible members respectively positioned in said. arms, an ac mating cogs; operative associated with the inner ends of said members and having an exterior thread sleeved upon the shaft and an actuating Wheel for said threaded portion and cone, substantially as set forth.

3. In a Churlt of the class described, the combination with a mounting shaft, of an actuating member comprising an operating (one and a screw having a large exterior thread cut thereon, means for rotating said cone, and extensible members adjustably aemated by the cone, substantially as set forth.

In testimony whereof we do now afiix our signatures.

JOHN W. DIRKSON. LEE E. CLOUGH. 

